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Debt - Amendment to Senior Secured Credit Facility - 2024 Term Loan (Details) $ in Thousands |  |  | 3 Months Ended
--- | --- | --- | ---
Feb. 01, 2018 USD ($) | Jan. 31, 2018 | Mar. 31, 2018 USD ($) | Mar. 31, 2017 USD ($)
Debt Instrument [Line Items] |  |  |  |
Repayments of debt |  |  | $ 541,812 | $ 50,335
Lines of credit | Second Amended and Restated Credit Agreement | Term Loan |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Repayments of debt | $ 350,000 |  |  |
Cash interest payments | $ 1,239 |  |  |
Repurchase price, percent | 1.00% |  |  |
Lines of credit | Second Amended and Restated Credit Agreement | Term Loan | Minimum | Alternate Base Rate (ABR) |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Basis spread on variable rate | 2.50% | 3.50% |  |
Lines of credit | Second Amended and Restated Credit Agreement | Term Loan | Maximum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Basis spread on variable interest rate, increase (decrease) | (0.01) |  |  |
Lines of credit | Second Amended and Restated Credit Agreement | Term Loan | Maximum | London Interbank Offered Rate (LIBOR) |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Basis spread on variable rate | 3.50% | 4.50% |  |

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- Definition Percentage price of original principal amount of debt at which debt can be redeemed by the issuer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph e -URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823 + Details
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- Definition Amount of cash paid for interest. Includes, but is not limited to, payment to settle zero-coupon bond attributable to accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4297-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3536-108585 + Details
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- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585 + Details
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